ホワイトオーガニック・ライト・エミッティング・ダイオードと光管の効率化
Sebastian Reineke1, Frank Lindner, Gregor Schwartz
1Institut für Angewandte Photophysik, George-Bähr-Strasse 1, D-01062 Dresden, Germany.
Nature
|May 16, 2009
まとめ
研究者らは,90 lm W(-1) の効率を達成し,光管を上回る先進的な白色有機発光ダイオード (OLED) を開発しました. OLED技術のこの突破は,非常に効率的で柔らかなエリアライトを将来のために約束します.
科学分野:
- マテリアルサイエンス 材料科学
- オプトエレクトロニクス (光電子機器)
- ソリッドステート照明
背景:
- ホワイトオーガニックライトエミッティングダイオード (OLED) は,効率的で広域の照明の可能性を秘めています.
- 現在のOLEDの電力効率は,確立されたベンチマークである光管に遅れをとっています.
- 構造的な詳細と測定条件の公開が限られていることは,高効率のOLEDの進歩を妨げています.
研究 の 目的:
- 現在の効率基準を上回る,改良されたホワイトOLED構造を開発する.
- OLEDにおけるデバイスの電力効率を高める方法を調査する.
- OLEDデバイスにおける電子-光子変換中のエネルギー損失を減らすために.
主な方法:
- エミッター層の構成を最適化しました.
- 高屈折率の基板の統合.
- 定期的なアウトカップリング構造の導入.
主要な成果:
- 装置の功率効率は90 lm W(-1) で1,000 cd m(-2) に達しました.
- 124 lm W ((-1) までの効率の潜在的可能性が実証されており,ライト・アウトカップリングが改善されています.
- 内部量子効率とエネルギー/オームの損失を削減しました.
結論:
- 開発されたOLED構造は,光チューブの効率に匹敵し,それを上回ります.
- 結果は,100 lm W ((-1) を超える効率を持つ白いOLEDの道を開く.
- 将来のホワイトライトOLEDは,優れた光質と効率により,好ましい光源になる可能性があります.
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